Porous structure of lime-based mortars studied by mercury intrusion porosimetry and nuclear magnetic resonance

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F16%3A00464440" target="_blank" >RIV/68378297:_____/16:00464440 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Porous structure of lime-based mortars studied by mercury intrusion porosimetry and nuclear magnetic resonance

Popis výsledku v původním jazyce

Moisture migration in porous materials is one of the main causes of building degradation. Therefore, the assessment of the properties connected with the movement of water is essential to evaluate the durability of materials. This study focuses on the characterization of the porous structure of lime-based mortars by mercury intrusion porosimetry (MIP) and nuclear magnetic resonance (NMR).MIP is one of the most used techniques in building materials research for determining the pore size distribution. However, the calculation of the pore size distribution from MIP data results in systematic deviations from reality, as it reflects the physics of how mercury intrudes into the material and is not controlled by the actual sizes of the pores present [1]. NMR is a nondestructive technique that can be used to determine accurately the pore water distribution by measuring the relaxation behavior of the NMR signal from a water saturated specimen [2]. In this analyze two lime-based mortars and correlate its pore size distribution obtained with MIP with the pore water distribution measured with a specially designed NMR apparatus [3]. Furthermore, we analyze the moisture migration directly by measuring the dynamic moisture transport during drying. The NMR technique enabled distinguishing different pore geometries with the same entrance size at a defined position in the specimen.

Název v anglickém jazyce

Porous structure of lime-based mortars studied by mercury intrusion porosimetry and nuclear magnetic resonance

Popis výsledku anglicky

Moisture migration in porous materials is one of the main causes of building degradation. Therefore, the assessment of the properties connected with the movement of water is essential to evaluate the durability of materials. This study focuses on the characterization of the porous structure of lime-based mortars by mercury intrusion porosimetry (MIP) and nuclear magnetic resonance (NMR).MIP is one of the most used techniques in building materials research for determining the pore size distribution. However, the calculation of the pore size distribution from MIP data results in systematic deviations from reality, as it reflects the physics of how mercury intrudes into the material and is not controlled by the actual sizes of the pores present [1]. NMR is a nondestructive technique that can be used to determine accurately the pore water distribution by measuring the relaxation behavior of the NMR signal from a water saturated specimen [2]. In this analyze two lime-based mortars and correlate its pore size distribution obtained with MIP with the pore water distribution measured with a specially designed NMR apparatus [3]. Furthermore, we analyze the moisture migration directly by measuring the dynamic moisture transport during drying. The NMR technique enabled distinguishing different pore geometries with the same entrance size at a defined position in the specimen.

Druh

O - Ostatní výsledky

CEP obor

AL - Umění, architektura, kulturní dědictví

OECD FORD obor

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Projekt

<a href="/cs/project/LO1219" target="_blank" >LO1219: Udržitelný pokročilý rozvoj CET</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů